EXT4-fs warning (device loop2): ext4_update_dynamic_rev:1054: updating to rev 1 because of new feature flag, running e2fsck is recommended
EXT4-fs error (device loop2): ext4_validate_block_bitmap:429: comm syz-executor.2: bg 0: block 46: invalid block bitmap
Kernel panic - not syncing: EXT4-fs (device loop2): panic forced after error
CPU: 1 PID: 364 Comm: syz-executor.2 Not tainted 5.15.183-syzkaller-1080537-g56993594bfa4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
 dump_stack+0x15/0x20 lib/dump_stack.c:113
 panic+0x283/0x760 kernel/panic.c:309
 ext4_handle_error+0x6f4/0x7b0 fs/ext4/super.c:667
 __ext4_error+0x198/0x370 fs/ext4/super.c:757
 ext4_validate_block_bitmap+0xf8a/0x13a0 fs/ext4/balloc.c:-1
 ext4_wait_block_bitmap+0x1b4/0x1d0 fs/ext4/balloc.c:579
 ext4_read_block_bitmap+0x41/0x80 fs/ext4/balloc.c:591
 ext4_mb_clear_bb fs/ext4/mballoc.c:6040 [inline]
 ext4_free_blocks+0xd69/0x2120 fs/ext4/mballoc.c:6286
 ext4_remove_blocks fs/ext4/extents.c:2523 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2689 [inline]
 ext4_ext_remove_space+0x25b8/0x4180 fs/ext4/extents.c:2937
 ext4_ext_truncate+0x1a3/0x250 fs/ext4/extents.c:4471
 ext4_truncate+0x9a6/0xfa0 fs/ext4/inode.c:4281
 ext4_process_orphan+0x1d9/0x320 fs/ext4/orphan.c:339
 ext4_orphan_cleanup+0x9d1/0x10c0 fs/ext4/orphan.c:474
 ext4_fill_super+0x8912/0x9030 fs/ext4/super.c:4966
 mount_bdev+0x2ae/0x3e0 fs/super.c:1400
 ext4_mount+0x34/0x40 fs/ext4/super.c:6618
 legacy_get_tree+0xed/0x190 fs/fs_context.c:611
 vfs_get_tree+0x89/0x260 fs/super.c:1530
 do_new_mount+0x25a/0xa20 fs/namespace.c:3014
 path_mount+0x675/0x1020 fs/namespace.c:3344
 do_mount fs/namespace.c:3357 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3542
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3542
 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fa4c38a7ae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa4c342a0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa4c39c6f80 RCX: 00007fa4c38a7ae9
RDX: 00000000200001c0 RSI: 00000000200006c0 RDI: 0000000020000640
RBP: 00007fa4c38f347a R08: 0000000000000000 R09: 0000000000000000
R10: 000000003f000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa4c39c6f80 R15: 00007ffd86d464f8
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..